Abstract
Measurements were made of the water solution rates of benzoic acid pellets fixed at points distributed through the volumes of three agitated tanks of differing size. Circulation patterns were established by noting the directions of movements of spots of a dye injected at the various points-The tanks were nominal 1, 10 and 100-gal units, each fully baffled and geometrically similar—the ratios between vessels of all linear dimensions being 1:2:4:5. Based on the experimental measurements and observation, correlations are developed for mass transfer and velocity gradients. From these, the appropriate scale-up relationship is obtained in terms of vessel dimensions, impeller speed and solute pellet size.
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